When Pliny Clapp was born on 5 August 1776, in Walpole, Norfolk, Massachusetts, United States, his father, Aaron Clapp, was 21 and his mother, Lois Holmes, was 24. He married Esther Billings on 28 November 1801, in Boston, Suffolk, Massachusetts, United States. They were the parents of at least 4 sons and 1 daughter. He died in 1846, in Walpole, Suffolk, Massachusetts, United States, at the age of 70, and was buried in Boston, Suffolk, Massachusetts, United States.
English (Devon and Somerset): either from Middle English clop(pe), clap(pe) ‘lump’, perhaps denoting a stocky person, or Middle English clap(pe) ‘loud noise; noisy, idle chatter’.
Americanized form of German Klapp .
In some cases also an Americanized form of Slovenian Klep: nickname from klep ‘sharpness of scythe or sickle’, also ‘sharpening with a hammer’.